#set terminal png
set terminal postscript eps 
set output 'groupme-evolution-untagged.eps'

set xdata time 
set timefmt "%Y-%m-%d" 
set format x "%b %d"
set xrange ["2007-07-10":"2007-12-20"]
set xlabel 'date'
set ylabel 'average number of untagged groups/resources'

show terminal
plot 'evolution-untagged.txt' 			using 1:2 with lines lw 1 lt 3			title "untagged resources and groups", \
	'evolution-untagged-resources.txt' 	using 1:2 with lines lw 3 lt 1  	title "untagged resources", \
	'evolution-untagged-groups.txt' 	using  1:2 with lines lw 3 lt 2		title "untagged groups"